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Extendable Window Bars NZ

Protect vulnerable windows with practical extendable security bars designed for New Zealand homes.

Easy DIY installation • Strong steel construction • Fast NZ delivery

From $54 • Extendable sizes • Fits most windows

  • Adjustable sizes
  • Easy to install with basic tools
  • Strong steel construction
  • Suitable for homes, rentals & businesses
Expandable Window Bars
Extendable Window Bars Size Comparison
Variants Expandable Heights Fixed Widths Spaces Among Bars Bar Diameters Bar Type Price Suitable For
Type A Min: 485mm
Max: 900mm		 340mm 120mm Outer: 16mm
Inner: 12mm		 3 round bars $54 Best for small windows (485–900mm)
Type B (BLACK) Min: 900mm
Max: 1650mm		 340mm 120mm Outer: 16mm
Inner: 12mm		 3 round bars $81 Best for wide windows (900–1650mm)
Type C (BLACK) Min: 630mm
Max: 1100mm		 300mm 100mm Outer: 20mm
Inner: 15.88mm		 3 square bars $66 Compact square bars for standard windows
Type D Min: 630mm
Max: 1100mm		 420mm 100mm Outer: 20mm
Inner: 15.88mm		 4 square bars $99 Increased coverage and strength
Type E Min: 630mm
Max: 1100mm		 540mm 100mm Outer: 20mm
Inner: 15.88mm		 5 square bars $108 Maximum coverage for higher security
Expandable Window Bars Installation Example

Not Sure Which Size to Choose?

Measure your window width and height.
Choose a security bar that extends beyond your window opening rather than matching the exact size.

Example:
Window width = 900mm
Recommended range:
1100mm or 1650mm

More overlap can help improve stability and coverage.

Extendable Window Bars

Your Header Menu

Frame Measurement
(Inside Window / Door Frame)




Best Fit Option

Click "Check Options" to view recommended window bar types and quantities for maximum coverage.

Best Value Option

Click "Check Options" to see the best value option with the fewest window bars that would fit into your window.
Extendable Window Bars 3 Round 900-1650mm (B) - Commercial, Residential, Window Bars, Windows - Black DIY XPANDA

Used Across New Zealand

Installed across:

  • Homes
  • Rental properties
  • Garages
  • Storage areas
  • Residential properties
  • Extendable Window Bars | 3 Square Bars | 630-1100mm Wide x 300mm High (C) - Commercial, Residential, Window Bars, Windows - Black DIY XPANDA
  • Extendable Window Bars | 3 Round Bars | 900-1650mm Wide x 340mm High (B) - Commercial, Residential, Window Bars, Windows - Black DIY XPANDA
  • DIY Xpanda Window Bars
  • Extendable Window Bars | 3 Round Bars | 485-900mm Wide x 340mm High (A) - Commercial, Residential, Window Bars, Windows - Black DIY XPANDA
  • Extendable Window Bars | 5 Square Bars | 630-1100mm Wide x 540mm High (E) - Commercial, Residential, Window Bars, Windows - Black DIY XPANDA
  • Extendable Window Bars | 3 Square Bars | 630-1100mm Wide x 300mm High (C) - Commercial, Residential, Window Bars, Windows - Black DIY XPANDA
  • Extendable Window Bars | 3 Square Bars | 630-1100mm Wide x 300mm High (C) - Commercial, Residential, Window Bars, Windows - Black DIY XPANDA

Why Choose Window Bars?

  • Adjustable sizes
  • DIY installation
  • Practical protection
  • Ready-to-ship NZ-wide
  • Strong steel construction

DIY vs Custom Security

  • DIY Xpanda → ready to be installed
  • Custom → wait about 2 weeks
  • DIY Xpanda → affordable
  • Custom → premium price

Simple Installation

  1. Measure your window frame
  2. Mark mounting points
  3. Drill and fix brackets
  4. Expand bars and secure

What Are Window Bars?

Also known as:

  • burglar bars
  • window security bars
  • window guards

They create a physical barrier that deters intruders and delays entry.

Layered Security

Often paired with alarms and cameras for layered security.
Window security is often one part of a broader home protection approach.

Prefer a Less Visible Option?

Clear-Guard Polycarbonate Security Bars - Clear Guard, Commercial, Doors, Gates, Residential, Window Bars, Windows - A DIY XPANDA

Clear Guard (Polycarbonate)

Clear Guard polycarbonate protection offers a more discreet alternative while maintaining visibility and natural light.

  • Transparent appearance
  • Impact resistant
  • Maintains visibility
  • Helps preserve natural light
Check Out Clear Guard

Looking for insect protection rather than intrusion protection?

  • Magnetic insect screens can help improve ventilation while helping reduce insects entering your home.

    Our DIY products are designed to protect against human intrusions.
    BUT if you're looking for a preventative measure against insects and bugs, window screens can help!
    Check out our partner Stay Safe Home Plus and their magnetic insect screens!
    They offer custom-made magnetic window screens that fit your windows perfectly and are built to last.

  • Magnetic-Insect-Screen-Stay-safe-home-plus
Check It Out